TWI412654B - Door clamping device for a vacuum chamber - Google Patents

Abstract

A clamping device is able to avoid burden on a hinge of a door when relieving the vacuum inside a chamber so as to enable easy confirmation of the vacuum state in the chamber. A door (D) is closed by a handle rod (3) to overcome the force application of a spring (7) and operate a hook member (6) to rotate toward a bearing seat (4). A front end side of an engaging face (62f) of a hook body (62) isabutted agsinst an engaging surface (42a) of a rolling drum (42) to press the door (D) toward a basket (B) and compress a gasket (P). The hook member (6) is maintained under a reactive force of the gasket (P) when the engaging surface (42a) of the rolling drum (42) falls into a recess face part (62g) of the hook body. Once the basket (B) is extracted to the vacuum, the gasket (P) is further compressed owing to a negative pressure. The engaging surface (42a) of the rolling drum (42) floats up from the recess face part (62g) of the hook body so as to release the engagement and the hook member 6returns to an original position under the force of the spring 7. Therefore, the vacuum degree in the basket (B) is obtained from the outside. Once the vacuum is relieved, the door is naturally opened, so as to avoid excessive burden on the hinge.

Description

Threshold clamp device for vacuum cabinet

According to the present invention, a sill that is hingedly coupled to a frame body is opened and closed between the front surface of the frame and the front surface of the frame, and the sill hingedly attached to the frame body is crimped to the frame body, thereby sealing the opening. Clamping device.

A door shackle for a vacuum cabinet is known, for example, from Patent Document 1. The clip lock device is a clip lock used to seal the opening of the vacuum cabinet with a lid portion, and the vacuum cabinet includes a vacuum cabinet portion having an opening for the entry and exit of the article, and a lid portion that can open and close the opening. The clip lock has: a strike portion attached to the cabinet portion; and a handle portion attached to the cover portion. The buckle portion has an action portion that is biased toward the inner side from the outer side of the cabinet portion. The latch member in the handle portion is crimped toward the outer side from the inner side of the cabinet portion with respect to the action portion of the buckle portion. The handle portion includes a lever handle, a hook member, and a coupling member interposed between the grip and the hook member. When the grip is rotated, the shackle member is rotated by the joint member, and resists the elastic pressure to press the action portion of the buckle portion, and the cover portion is crimped to the cabinet with a reaction force.

Since the action portion of the buckle portion is biased toward the inner side from the outer side of the cabinet portion, when the vacuum degree of the cabinet portion becomes high and the cover portion moves toward the cabinet portion, the action portion of the buckle portion will follow By this action, the shackle member can maintain the pressure contact state with respect to the buckle portion, and as a result, no air leakage occurs in the vacuum cabinet.

(previous technical literature) (Patent Literature)

(Patent Document 1): JP-A-2010-47978

In the conventional clip locking device, since one side of the cover portion is constantly crimped to the cabinet portion, when the air above atmospheric pressure is introduced into the cabinet, the stress due to the action of the cover portion is generated. Will focus on the hinge, and there will be a flaw in the fatigue of the hinge. Further, in a state in which the cover member is locked by the clip locking device, it is not easy to visually recognize whether or not the inside of the cabinet is in a vacuum state.

Therefore, the object of the invention is to provide a clip-locking device which can release the restraint of the cover when the vacuum in the cabinet is released, eliminates the burden on the hinge, and can easily confirm whether the cabinet is in a predetermined vacuum state from the outside.

Hereinafter, the component symbols will be described with reference to the drawings, but the present invention is not limited thereto.

In order to solve the above problem, the yoke lock device 1 of the present invention is configured such that the transmission pad P is hingedly connected to the opening B2 of the front side B1 of the frame B constituting the vacuum cabinet between the front surface B1 of the casing B and the front surface B1 of the casing B. The threshold D of the frame B is crimped to the frame B, thereby sealing the opening B2, and the clip device 1 is provided with a plurality of clip units 2 connected by the grip 3 in linkage with each other. The clip unit 2 is provided with a buckle 4, a pedestal 5, a hook member 6, and a spring 7. The buckle 4 is attached to the front surface B1 of the frame B and has an engagement surface 42a opposed to the front surface. The pedestal 5 is attached to the front surface D1 of the sill D corresponding to the buckle 4. The hook member 6 is pivotally connected to the pedestal 5 by a pivot 53, and is detachable from the engaging surface 42a of the buckle 4 between the unlocked position as the original position and the locked position engaged with the engaging surface 42a. Positive and negative rotation. The spring 7 rotates the hook member 6 to its original position. The hook member 6 is coupled with the hook member 6 of the other clip unit 2, and extends from the pivot portion of the pedestal 5 beyond the buckle 4 to the front of the buckle 4, and has a corresponding engaging surface 62f. When the hook member 6 is rotated toward the buckle 4, the corresponding engaging surface 62f slides while pressing the engaging surface 42a facing the buckle 4 toward the front. The corresponding engagement surface 62f includes a concave surface portion 62g that holds the engagement surface of the buckle 4 in a state where the compression pad P is pressed against the frame B by a predetermined compression amount. 42a, when the pad P is more compressed by the negative pressure in the frame B, it is disengaged from the engaging surface 42a of the buckle 4, and the original position of the hook member 6 is allowed to return.

According to the apparatus of the present invention, when the vacuum in the cabinet is released, the threshold D is naturally opened, so that even if air above atmospheric pressure is introduced into the cabinet, an excessive load is not imposed on the hinge. When the predetermined degree of vacuum is reached in the cabinet, the hook member 6 is returned to the original position, so that the state inside the cabinet can be easily confirmed from the outside.

Embodiments of the present invention will be described with reference to the drawings.

The frame B constituting the vacuum cabinet has an opening B2 through which the article enters and exits on the front side B1 side. The frame B is hinged to open and close the threshold D of the opening B2. A spacer P is interposed between the front surface B1 of the frame B and the threshold D.

The yoke lock device 1 seals the opening B2 by pressing the sill D against the front surface B1 of the frame B. The clip lock device 1 is provided with a plurality of clip units 2 that are coupled to each other by the grip 3 to be interlocked with each other. Each of the clip-locking units 2 is provided with a buckle 4 attached to the frame B, a pedestal 5 fixed to the sill D, and a hook member 6 which is detachably engaged with the buckle 4 at the pedestal 5; and a spring 7 The hook member 6 is rotatably biased to the original position from the buckle 4.

The buckle 4 is attached to the front surface B1 of the frame B and has an engagement surface 42a opposed to the front surface. The buckle 4 includes a bracket 41 fixed to the frame B and a roller 42 that is stretched over the bracket, and an engagement surface 42a that faces the front surface B1 of the casing is formed on the outer circumference of the roller.

The pedestal 5 is attached to the front surface D1 of the sill D so as to face the buckle 4 in a locked state of the sill D. The pedestal 5 includes a mounting portion 51 that is fixed to the front surface of the sill D by bolts, and a pair of bearing portions 52 that rise from the mounting portion and extend toward the front of the buckle 4.

The hook member 6 is pivotally connected to the bearing portion 52 of the pedestal 5 by a pivot 53, and is detachable from the engaging surface 42a of the buckle 4 as an unlocked position of the original position (the position shown by a broken line in Fig. 1 is The position shown by the solid line in Fig. 2 is rotated forward and backward with the locking position (the position shown by the solid line in Fig. 1) engaged with the engaging surface 42a, and is rotated by the spring 7 to Original location. As shown in Fig. 5, the spring 7 is wound around the outer circumference of the pivot shaft 53, one end of which is locked to the bearing portion 52, and the other end of which is locked to the hook member 6.

The hook member 6 is coupled to the hook member 6 of the other clip unit 2 by the grip 3, and the hook member 6 and the grip 3 are simultaneously operated. As shown in FIGS. 1 and 3, in the locked state of the sill D, the axis of the pivot 53 is disposed substantially parallel to the axis of the roller 42 in the vertical front with respect to the front surface of the casing. The hook member 6 extends from the pivotal portion of the pedestal 5 beyond the buckle 4 to the front of the buckle 4. When the hook member 6 is rotated toward the buckle 4, the corresponding engaging surface 62f of the hook member applies a pushing force toward the front facing the engaging surface 42a of the buckle 4 (for the threshold D, the threshold D is pushed to The pressure of the frame B is slid on one side. The engaging surface 62f includes a concave surface portion 62g. The concave surface portion 62g holds the engagement surface 42a of the buckle 4 in a state where the compression pad P reaches a predetermined compression amount and pushes the sill D to the frame B, and when the spacer P is negative due to the inside of the frame B When pressed more and more compactly, it is detached from the engaging surface 42a of the buckle 4, and the hook member 6 is allowed to return to its original position.

The hook member 6 is provided with a body 61 and a hook body 62. One end side of the body 61 is pivotally supported by the pedestal 5 by a pivot 53, and the other end is coupled to the grip 3, and has a joint portion 61a coupled to the hook body 62 in the middle. The joint portion 61a is provided with a housing cavity 61b.

The other end side of the main body 61 is formed with a through hole 61g through which the grip 3 is inserted, and a bolt hole 61h orthogonal to the axis of the through hole. As shown in FIGS. 3 and 4, the clip unit 2 disposed at both end portions of the grip 3 is screwed to the screw hole previously formed in the grip 3 by the bolt hole 61h, and is fixed to the grip. Put 3 Further, screw holes 61j for fixing the rod holding members 8 (Figs. 10 to 12) by bolts 81 are formed on both side faces of the gripping direction of the grip 3 in the main body 61.

As shown in FIGS. 10 to 12, when the lever holding member 8 is additionally provided with the clip unit 2 at the intermediate portion of the grip 3, it is attached to both side faces of the hook member body 61 of the clip unit 2, Further, the mounting portion 81 fixed to the side surface of the main body 61 by the bolt 83 and the ring portion 82 partially cut by the slit 82a are provided. The ring portion 82 surrounds the outer periphery of the grip 3 and locks the sides of the slit 82a with bolts 84, thereby holding the grip 3. The length of the grip 3 can be changed according to the size of the threshold D, and a plurality of clip units 2 can be disposed in the middle as needed.

The hook body 62 is provided with a shank portion 62a and an engaging portion 62b, and the shank portion 62a is housed in the housing cavity 61b of the joint portion 61a so as to be able to change the fixed position in the axial direction.

As shown in Fig. 1, the shank portion 62a extends from the joint portion 61a of the main body 61 toward the axis at a right angle with respect to the straight line L1 of the axial center A1 of the joint pivot 53 and the axis A2 of the grip, at the hook. The locking position of the member 6 is disposed substantially perpendicular to the front face B1 of the frame B. As shown in Fig. 6, the shank portion 62a has small screw holes 62c in the direction orthogonal to the axis, and as shown in Fig. 5, has a screw hole 62d extending in the axial direction. The engaging portion 62b of the hook body 62 is bent at a right angle from the front end of the shank portion 62a, and an engaging surface 62f and a concave surface portion 62g are formed on the inner side surface thereof.

As shown in Fig. 6, the hook member body 61 has a long hole 61c corresponding to the small screw hole 62c of the shank portion 62a, and as shown in Fig. 5, has a bolt hole 61d corresponding to the screw hole 62d. The fixing bolt 62e is screwed into the small screw hole 62c of the shank through the long hole 61c, and the adjusting bolt 61e is screwed into the screw hole 62d of the shank through the bolt hole 61d. By adjusting the forward and reverse rotation of the bolt 61e, the length of the shank 62a extending from the body 61 can be adjusted depending on the thickness of the spacer P or the thickness of the sill D. That is, the shank portion 62a is fitted in the cavity 61b, and is spring-loaded in a direction protruding from the cavity 61b by being inserted into the spring 61g between the bottom of the cavity. By tightening the adjustment bolt 61e, the spring 61f is compressed and the shank portion 62a is pulled into the cavity 61b, or by loosening the adjustment bolt 61e, the spring 61f is released to cause the shank portion 62a to protrude from the cavity 61b. After the adjustment, the fixing bolt 62e is locked and the hook body 62 is fixed to the body 61.

When the vacuum cabinet is used, after the desired item enters and exits the frame B through the opening B2, the door sill D is closed, and the grip 3 is held, and the resistance spring 7 is taken from the position of the broken line (Fig. 2) of Fig. 1 The operation of rotating the hook member 6 toward the buckle 4 in the counterclockwise direction. As the hook member 6 rotates, the front end side of the engaging surface 62f of the hook body 62 abuts against the engaging surface 42a of the roller 42, and pushes the sill D to the frame B, while compressing the cushion P, one side of the phase The sliding surface 42a slides. Further, the hook member 6 is held by the repulsive force of the spacer P in a state where the engagement surface 62a of the roller 42 falls into the concave surface portion 62g of the hook body, and the engagement portion 62b is disposed in this state. The front surface B1 of the frame B is substantially parallel. Thus, the opening B2 is sealed. When the inside of the frame B is vacuumed and the pad P is more compressed by the negative pressure in the frame B, the engaging surface 42a of the roller 42 floats from the concave surface 62g of the hook body, and each other The engagement is released, and at the same time, the hook member 6 is returned to the original position shown in Fig. 2 by the spring pressure of the spring 7. Since the hook member 6 returns to the original position, it can be observed from the outside that the degree of vacuum in the frame B has reached a predetermined value. When the vacuum cabinet is used and the atmosphere inside the casing is introduced, the threshold D is naturally opened. Therefore, even if air of atmospheric pressure or more is introduced into the casing, an excessive load is not applied to the hinge. The length of the shank portion 62a extending from the body 61 is finely adjusted in accordance with the thickness of the spacer P or the thickness of the sill D.

1. . . Clamping device

2. . . Clamp unit

3. . . Grip

4. . . Buckle

5. . . Pedestal

6. . . Hook member

7. . . spring

8. . . Rod clamping member

41. . . bracket

42. . . Roll

42a. . . Engagement surface

51. . . Installation department

52. . . Bearing department

53. . . Pivot

61. . . Ontology

61a. . . combination

61b. . . Storage cavity

61c. . . Long hole

61d. . . Bolt hole

61e. . . Adjustment bolt

61f. . . spring

61g. . . Through hole

61h. . . Bolt hole

61i. . . bolt

61j. . . screw hole

62. . . Hook body

62a. . . Handle

62b. . . Clamping department

62c. . . Small screw hole

62d. . . screw hole

62e. . . Fixing bolt

62f. . . Engagement surface

62g. . . Concave face

81. . . Installation department

82. . . Ring

82a. . . Slot

83, 84. . . bolt

A1. . . Roll axis

A2. . . Axis of the pivot

B. . . framework

B1. . . Front of the frame

B2. . . Opening

D. . . Threshold

D1. . . Before the threshold

P. . . pad

Figure 1 is a plan view showing the locked state of the clip lock device.

Fig. 2 is a plan view showing the unlocking state of the clip lock device of Fig. 1.

Figure 3 is a front elevational view of the clip lock device of Figure 1.

Figure 4 is a right side view of the clip lock device of Figure 1.

Figure 5 is a cross-sectional view taken along line V-V of Figure 3.

Figure 6 is a cross-sectional view taken along line VI-VI of Figure 4.

Fig. 7 is a rear elevational view of the hook member body in the clip lock device of Fig. 1.

Figure 8 is an exploded perspective view of the clip lock device of Figure 1.

Figure 9 is an exploded perspective view of the clip lock device of Figure 1.

Fig. 10 is a plan view of an additional clip unit disposed in the middle.

Figure 11 is a front elevational view of the clip lock unit of Figure 10.

Figure 12 is a side view of the clip lock unit of Figure 10.

1. . . Clamping device

2. . . Clamp unit

3. . . Grip

4. . . Buckle

5. . . Pedestal

6. . . Hook member

7. . . spring

41. . . bracket

42. . . Roll

42a. . . Engagement surface

51. . . Installation department

52. . . Bearing department

53. . . Pivot

61. . . Ontology

61a. . . combination

61i. . . bolt

61j. . . screw hole

62. . . Hook body

62a. . . Handle

62e. . . Fixing bolt

62f. . . Engagement surface

62g. . . Concave face

A1. . . Roll axis

A2. . . Axis of the pivot

B. . . framework

B1. . . Front of the frame

B2. . . Opening

D. . . Threshold

D1. . . Before the threshold

P. . . pad

Claims (6)

A sill clamping device for a vacuum cabinet is configured such that a sill hingedly connected to a frame body is opened and closed between the front surface of the frame and the front surface of the frame, and the sill hinged to the frame body is pressed against the frame body. By means of the sealed opening device, the clip locking device has a plurality of clip locking units connected by the grips in a manner of interlocking with each other; the clip locking unit is provided with a buckle, which is mounted on the front surface of the housing and has a seating surface opposite to the front surface; the pedestal is mounted on the front surface of the sill corresponding to the buckle; the hook member is pivotally connected to the pedestal, and is detachable from the original position of the engaging surface of the buckle, Rotating forward and backward with the locked position; and a spring for rotating the hook member to the original position; the hook member is coupled to the hook member of the other of the clip unit by the handle, and The pivotal portion of the pedestal extends beyond the buckle to the front of the buckle, and has an engaging surface that faces the aforementioned buckle when the hook member rotates in the direction in which the buckle approaches Joint application The pressing force on the front side slides; the engaging surface of the hook member includes a concave surface which is held in a state in which the sill is pressed to the frame while compressing the pad to a predetermined compression amount. When the buckle is engaged with the surface and the cushion is more compressed by the negative pressure in the casing, the engagement surface of the buckle is disengaged to allow the hook member to return to the original position. The sill clamp device for a vacuum cabinet according to the first aspect of the invention, wherein the buckle has a bracket fixed to the frame, and a roller that is mounted on the bracket, and is formed on the outer circumference of the roller The pedestal is opposed to the front surface of the frame, and the pedestal is extended from the front surface of the sill to the front of the buckle, and the axis of the pivot and the axis of the roller are arranged relative to the front surface of the frame. They are arranged in the vertical direction and in parallel with each other. The sill clamp device for a vacuum cabinet according to the first or second aspect of the invention, wherein the hook member is provided with a main body, one end side of which is pivotally supported by the pedestal by the pivot, and the other end is Linked to the grip; and the hook body having a handle extending from a central portion of the body with respect to a pivot center of the pivot joint and a shaft of the grip; the hook system is provided with the handle An engaging portion that is bent at a right angle and extends, and an engaging surface of the hook member is formed on an inner side surface of the engaging portion. The sill clamp device for a vacuum cabinet according to the third aspect of the invention, wherein the system of the hook member has a joint portion with the hook body at an intermediate portion, and the joint portion is configured to change an axial direction. The fixed position and the handle of the hook body can be accommodated. The sill clamp device for a vacuum cabinet according to the fourth aspect of the invention, wherein the handle portion of the hook body has a screw hole extending in an axial direction, and the system has a bolt hole corresponding to a screw hole of the handle portion, The rotation of the adjusting bolt screwed into the screw hole of the shank through the bolt hole is configured to adjust the length extending from the body of the shank. The shackle lock device for a vacuum cabinet according to claim 1, wherein the shackle unit includes: first and second nip units coupled to both ends of the grip, and at least one connected to the grip At least three of the third clip units in the intermediate portion, the hook member system includes a through hole through which the gripper is inserted at the distal end side, and two axial directions of the grip in the third clip unit a rod holding portion is provided on the side, and the rod clamping portion includes a mounting portion that is bolted to the hook member body of the third clip unit, and a ring portion that is cut by a slit. The loop surrounds the outer periphery of the grip and locks the sides of the slit with a bolt, thereby gripping the grip.